Intermittent feed-and-cut wood cutting saws



f? 1949' B. w. ANDRUS 2,480,536 I INTERMITTENT FEED-AND-GUT WOOD CUTTING SAWS Filed Aug. 16, 1944 2 Sheets-Sheet l l NVENTOR BU D D W, AN DRUS ATTORNEY Aug. 30, B w ANDRUS INTERMITTENT FEED-AND-CUT WOOD CUTTING SAWS Filed Aug. 16, 1944 2 Shee ts-Sheet 2 BUD'D w. ANDRUS ATTORNEY Patentecl Aug. 30, 1949 UNITED STATES OFFICE INT-ERMI TTENT FEED-AND-CUT WOOD CUT-TING SAWS Budd W. Andrus, Eugene, Oreg. Application August 1 6, 1944; Serial No.- 549,685

v 4 Claims. I s.

This invention relates to wood cutting saws and is primarily adaptedtior cutting slab wood into lengths adapted to be burned in stoves, furnaces and the like;

The: primary object of the inventionis to feed slabs through: a cut off saw by a conveyor wherein the conveyor moves the slab to out off position at Wl'li'Chi time .the end of the slab will operate an electric switch system that will stop the movement of the conveyor and start the saw carriage across theslab; and on the return trip of the saw carriage a suitable operating mechanism will deliver the out off portion of the slab into a delivery chute.

have found that inv the cutting: off of slab wood it is: most desirable to hold the cut off portion of the slab in alignment with the slab until the' saw has; completely passed through the cut, at which time: it is most desirable: to discharge this out off piece of slab wood away from the return travel of: the saw, which eliminates interfering with the return travel; of the saw to its initial starting position;

These and other incidental: objects will be apparent inthe drawings, specification and claims.

Referring to the drawings:

Figure 1 is an end view of my new and improved wood saw.

Figure'z is a plan view of Figure 1.

Figure 3lis a'secti0na1 sideviewof my new and improved" wood saw, takenon line 33 of Figure 2 looking irr the direction indicated.

Figure 4 is a' diagrammatical layoutof the electtrio control system for operating. the? motors of the wood saw.

In the drawings:

The wood saw consists of suitable framework I h aving'a conveyor 2- mounted therein. The con.- veyoris driven by a suitable power unitas electric motor 3 reduction gear 4: and sprocket 5'; driving the chairr 6 which in turn drives the sprocket 1. roller 1A and? conveyor belt 8; A circular saw! 9 is journalled to a cross bearing I 0; whichiform's partof a: sliding motor base II The base HE is slidably mounted upon= supporting bars: l2, which are" mounted within the framework of the machine'by' any suitable fastening means.-

The saw 9 is driven by the motor [3* through the belt M; which is trained about the pulleys l '5 an'di IF. By mounting the saw in this' 'ma'ntier relatively small diameter saw can be used still provitiingfcr a maxiinunrdepthoi out. Tli'es d"- ings' base HF and the motor I 3 are moved liorie zonta'lly' of the bars I'2 by a connecting rod l T, which is pivotally connected: to the: base it at l 8 and to'the driving disk t9 by the bearing 20.: The drivingdisk #9 is mounted within suitable bear ings 2i and" is: driven: through a" reduction gear 22' and motor In the operation: of my new and improved" wood saw the conveyor belt 8 moves the slab 24, as cated by the broken lines Figures 2 and 3 towards the pivotally mounted end! gate 26*. m Figures I illustrate a slab having moved. the end gate- 265 from a vertical position. The end gate is; fixedly mounted: to the shaft 21,. which has a switch; operating bar 28 fixedly mounted thereon; as the gate 2'6 is moved to the positionas illustrated Figure 4 the switch: operating bar will operate the switch arms 35: and 36 within the switch boxes and B closing the following electric circuit;- En'ergy' will' flow from the' supply line 33, through the conductor 34 and into the switches 35 A and 36-A,- through the switch 35A the current will flow into the-conductor 31 through the solenoid 38 and been to the supply line 39 through the conuuet'or 40. when this hamt'ens the motor switch M Will beopriedby the solenoid 38-. The motor switch 4| controls the electric circuit through the motor 3; which drives the conveyor 2" thereby stopping the conveyor;- 7

When the switch arm- 31? was: operated by a switchbar 2%, elect!" energy" will flow from the conductor 34 into the switch 36K and out-through the conductor $2 to the solenoid 43,-which wil-1 closethe" motor switch 44' asillustrated in Figure 42' G'urreIi-t will then new throug'l'i the switch 442 through conductor 45 and motor 23- baekto the supply line; Thi'swill start'the motorla which will revolve the driving disk I9 in the direction of the arrow; moving the connecting rod I 1 towards the motor base' I I, thereby forcing the saw assembly in the" direction of the" arrow in Figurel through the'slab'cutting off the end-47 When the saw has passed through the" out it'- is desirable to discharge the piece 41 awayfromtlle machine. The piece 41 rests upon-aplaktjforin 4B which is mounted m a cross shaft 4'9 workin within suitable bearings 5t mounted to the framework of the machine. The platform 49 is held in a horizontalpo'sition'bya system cfimirs and lever arms as follows. 0

Fixedly mounted to the end of" the shaft 4%? is an arm 51, this arm is connected to" a pivotaii'y mounted 52 by a link 53. The arm are mounted to a cross shaffi 54-jburna1lea-1i1- a tearing 55% The cro'ss shaftliaslanf arm 56 fixedly mounted to its obposite" end which is connected to the 58 153? mm: 59. The crank arm 58 is fixedly mounted to the sl'laft 602 which iswar-- nalled within a suitable cross bearing Bl mounted to the frame of the machine.

Fixedly mounted to the opposite end of the shaft 50 is a crank arm 62 which has a cam roller 63 rotatably mounted thereon. When the cam 64, forming part of the driving disk is, reaches the roller 63 it will operate the linkage assembly above described so as to lower the platform 48 from under the cut portion of the piece 41 of the slab 24 allowing the portion 41 of the slab to be delivered into a chute 41A from where it is delivered by any suitable conveying system away from the machine.

Further rotation of the driving disk [9 will pull the connecting rod I! and the saw assembly 46 back past the slab to the position shown in Figure 1. Before the saw assembly reaches this position the cam 54 will allow the cam roller 63 to move the linkage connections to the platform 48, returning the platform to a horizontal position by the action of the spring 65. By allowing the pieces of the slab 41 to be moved out of the way before the saw returns through the cut, jamming of the saw is prevented which has heretofore interfered with the operation of machines of this kind.

This is one of the outstanding objects of my invention, the holding of the end 41 of the slab in alignment with the slab until the out has been completely made, then discharging this piece away from the path of the saw on its return through the out. When the saw assembly 46 approaches its final return travel the base I I will contact the bell cranks 66 and 61, pivoting them about their pivots 61A, unlatching the latches 68 and 69 from the solenoid cores l permitting the springs TI to close the electric switch 4| and open the switch 44. This will start the conveyor motor 3 and stop the motor 23 from moving the saw assembly 46. The slab will then be moved forward until it reaches the gate 26 when another cycle of operation will begin as heretofore described. The latches 68 and 69 are provided for holding the switches 4| and 44 in the proper position after the solenoids 38 and 43 have been energized by the operation of the switches 35A and 36A. The switches 35A and 35A are only momentarily operated, therefore suitable holding latches 68 and 69 have been provided for holding the switches 4| and 44 in a fixed position until the cycle of operation has been completed.

The following is a brief description of the operation of my new and improved wood saw. Slabs are placed on the conveyor belt 8 at a distant point end to end, the belt 8 brings the slabs to the cutting position at which time the end of the slab will contact a switch operating gate which opens the electric circuit of the conveyor motor 3 driving the conveyor belt, 8 at the same time closes a switch to start the motor 23, revolving the driving disk I9 and moving the saw assembly 46 across the slab. The saw 9 being driven constantly at all times. After the saw 9 completes its out through the slab the platform 49 is moved out from underneath the slab portion 41, discharging the same into a suitable chute or conveyor. The saw assembly 46 is then moved by the driving disk and its connecting rod [9 back past the end of the slab on the conveyor to its starting position as illustrated in Figures 1 and 2, this completes a cycle of operation. The conveyor 8 being stationary while the saw assembly 46 moves through the slab and back again.

I do not wish to be limited to the exact mechanical and electrical construction as illustrated, as

4 other equivalents may be used, still coming within the scope of my claims.

I claim:

1. A wood sawing machine comprising, in combination, a frame, a horizontal conveyor on said frame for feeding wood longitudinally, a platform pivotally mounted about an axis transverse of the direction of feed on said frame beyond the end of said conveyor to be horizontally positioned at the level of said conveyor to support the leading end of the wood during the cutting operation, the edge of said platform when in horizontal position being spaced from the end of said conveyor to define a saw path transverse the movement of said conveyor, a rotary cut-off saw, means for driving said saw, a saw and drive means support slidably mounted on said frame for reciprocal movement to move said saw through said saw path to cut the wood transversely of its length, means for moving said support through its reciprocal movement, and means operative upon the completion of the cutting stroke of movement of said support for pivoting said platform to discharge the severed part of the wood.

2. A wood sawing machine comprising, in combination, a frame, a horizontal conveyor on said frame for feeding wood longitudinally, a platform pivotally mounted about a horizontal axis at right angles to the direction of feed on said frame beyond the end of said conveyor to be horizontally positioned at the level of said conveyor to support the leading end of the wood during the cutting operation, the edge of said platform when in horizontal position being spaced from the end of said conveyor to define a saw path transverse the movement of said conveyor, a rotary cut-ofl saw, means for driving said saw, a saw and drive means support slidably mounted on said frame for reciprocal movement to move said saw through said saw path to cut the wood transversely of its length, means for moving said support through its reciprocal movement, and means operative by said support moving means upon the completion of the cutting stroke of movement of said support for pivoting said platform to discharge the severed part of the wood.

3. A wood sawing machine comprising, in combination, a frame, a horizontal conveyor on said frame for feeding wood longitudinally, means for driving said conveyor, 9. platform pivotally mounted on said frame beyond the end of said conveyor to be horizontally positioned at the level of said conveyor to support the leading end of the wood during the cutting operation, the edge of said platform when in horizontal position being spaced from the end of said conveyor to define a saw path transverse the movement of said conveyor, a rotary cut-ofi saw, means for driving said saw, a saw and drive means support slidably mounted on said frame for reciprocal movement to move said saw through said saw path to out the wood transversely of its length, means for moving said support through its reciprocal movement, means operative by said support moving means upon the completion of the cutting stroke of movement of said support for pivoting said platform to discharge the severed part of the wood, a control member above said platform for engagement by the leading end of said wood, and means controlled by said control member for normally activating said conveyor drive means and de-activating said support moving means but operative upon movement of said control member by the wood to deactivate said conveyor means and activate said support moving means.

4. A wood sawing machine comprising, in combination, a frame, a horizontal conveyor on said frame for feeding wood longitudinally, a platform mounted on said frame beyond the end of said conveyor to be horizontally positioned at the level of said conveyor to support the leading end of the Wood during the cutting operation, said platform being pivotally mounted at its edge that is remote from said conveyor, the free edge of said platform when in horizontal position being spaced from the end of said conveyor to define a saw path transverse the movement of said conveyor, a rotary cut-off saw, means for driving said saw, a saw and drive means support slidably mounted on said frame for reciprocal movement to move said saw through said saw path to cut the Wood transversely of its length, means for moving said support through its reciprocal movement, and means operative by said support moving means upon the completion of the cutting stroke of movement of said support for pivoting said platform to discharge the severed part of the wood.

BUDD W. ANDRUS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

